Pretty straightforward. Looking at the Big Ten teams and their current standings as well as the schedules they have ahead of them, speculate on where they'll end up.
I'll start:
Ohio State-15-0 baby (but I could also see a 13-2 season where we drop one regular season game, win the Big Ten championship, win our playoff semifinal, and then get to the championship game and lose)
Michigan-12-1 (only loss comes at the Buckeyes--they win the Rose Bowl against Utah or some other overmatched Pac-12 team, their fans yowl about how they could have beaten Bama or something--this is the highpoint of the Harbaugh years, it's all downhill from here)
Nebraska-11-3 (lose to the Buckeyes twice, lose their bowl game by a missed 2-point conversion because they're Nebraska)
Wisconsin-10-3 (losses to Michigan, OSU, and Nebraska, win their bowl game)
Michigan State-8-5 (lose to OSU and Michigan, lose their bowl game)
Indiana-8-5 (go 7-5, win their bowl game against a decent ACC team like North Carolina or Pitt)
Minnesota-8-5 (7-5, win their bowl game against some underperforming SEC team that everyone loved at the beginning of the season)
Penn State-7-6 (because it's part of their contract)
Maryland-7-6 (they go 6-6 and then win their bowl game)
Iowa-6-7 (Ferentz wins coach of the decade by being brave enough to "experiment with mediocrity")
Northwestern-4-8
Rutgers-3-9
Purdue-3-9
Illinois-1-11